Basic acoustics web pages? ("Gregory J. Sandell" )

Hello,
A colleague of mine asked me if he knew of any web pages devoted to
issues of basic acoustics, such as would be suitable for an
undergraduate course in the subject. One thing he mentioned that would
be useful to him is the ability to enter a frequency in Hertz and get a
soundfile in return of a sinetone at that frequency (as well as a
graphic of the wave). Any ideas?
Thanks,
Greg
--
Gregory J. Sandell, Research Associate, sandell(at)sparky.parmly.luc.edu
Parmly Hearing Institute, Loyola University Chicago
6525 N. Sheridan Chicago IL 60626 USA voice:773-508-3976 FAX:773-508-2719
WWW: http://www.parmly.luc.edu/sandell/